It is reported that ‘Abd Al-Rahmān b. Mahdī – Allāh have mercy on him – said, “If it were not for the fact I hate that Allah is disobeyed, I would have wished that no one remain in this city except that he had spoken ill of me and backbitten me; for what is nicer than a good deed a man finds in his records on the Day of Resurrection without having done a thing or even having known?”
Abū Nu’aym, Hilyatu Al-Awliyā` 4:45.
This is a reference to a person who has been backbitten receiving good deeds on the Day of Judgment from the person who backbit him and didn’t repent and make amends, as mentioned in some narrations from the Prophet – Allah’s peace and blessings be upon him. The narration reminds us of the dire consequences of backbiting others: your good deeds may go to them if you don’t repent and make up for what you have done. It also provides assurance for those who have been backbitten: if left wronged in this life, they will be given good deeds in the hereafter as compensation and justice will be done.